A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 4140-01-292-7854
NSN 5985-00-526-3469
NSN 5925-01-039-5391
NSN 6645-00-400-7955
NSN 6320-01-498-4954
NSN 5910-00-008-6752
NSN 6130-00-081-2186
NSN 5960-01-278-8850
NSN 6240-00-872-3365
NSN 5895-01-339-7612
NSN 6130-01-109-5053
NSN 5960-01-128-4431